As it says in the title, I will list the powers of the Downstreamers from the Manifold Trilogy, but connecting them with the powers they have on this wiki.
I have no reason to do this, I just thought it would be interesting to do.
Scientiapotence (The first and most obvious, since they are one of those listed as users of this power.)
Absolute Regeneration (Capable of reforming themselves after their informational body/consciousness has been completely destroyed by the wave of unreality)
Immortality & Self-Sustenance (They live eternally and no longer require food, oxygen or anything else to stay alive, although they can still die.)
Accelerated Thought Process & Hyper Mind (Their non-corporeal forms include a Causal Loop computer that essentially makes them know things before they happen, a device which grants them infinite thinking and processing power.)
Precognition & Future-Probability Cognition (Knows every possible event that will unfold in the multiverse, being able to tell everything that will happen by the minimal possible movement/quantum alteration from a single sub-atomic particle)
Nigh-Omniscience (The Old Ones are able to comprehend and manipulate the "infinite manifold" that encompasses all mathematical possibilities)
Teleportation & Dimensional Travel (Can create wormholes powered up by gravity fields, which allows them to travel through time and different universes)
Time Manipulation & Time Travel (Can significantly accelerate flow of time in a solar system. Can send attacks through time)
Invulnerability, Non-Corporeal Form & Transcendent Human Physiology (Hyperadvanced posthuman civilization, neutrino/quantum consciousness/informational beings)
Higher-Dimensional Manipulation & Beyond-Dimensional Physiology (They are entities made of pure information, who cannot be distinguished by any means whatsoever, even in principle, across past, present and future)
Gender Transcendence (Individual Downstreamers are formerly human and retain their mental humanity upon ascension, but as beings of pure information, it is unknown if they still retain "gender" or not)
Reality Warping & Subjective Reality (Their minds can call universes into existence through their observations)
Physics Manipulation, Matter Manipulation, Quantum Manipulation, Law Manipulation, Mathematics Manipulation & Gravity Manipulation (Can manipulate and shoot quark-nugget matter. These quarks can create gravity strong enough to destroy neutrons from the atmosphere and also bypass conventional matter durability as if it was made of butter)
Acausality (Perceives causality from a non-linear, acausal state, and later transcended causality as a whole after removing themselves from the timeline's history)
Causality Manipulation (They transcend causality and could alter causality on multiversal scale)
Concept Manipulation probably Meta or Lordship (The Old Ones created and transcended an "ultimate reality" which contains the crux of all logical concepts)
Spatial Manipulation (Can create and fold infinite space within finite structures)
Existence/Absolute Erasure & Nothingness Manipulation (Capable of deleting individuals from existence. Can vanish things into unreality / Unreality Wave: Mixes all different possible states of a universe from phase space until the universe is completely destroyed. / Cosmic Inflation: Produces seeds which grow into countless universes. These universes are compared to bubbles in foam floating on an ocean.)
Absolute Technology Manipulation (Has technology that allows them to disturb the air and atmosphere on the surroundings. Can effortlessly create abstract material with their thoughts which can withstand the combined energy of a thousand big bangs per second. Similarly, they possess weapons capable of carving giant maws on a construct which is noted to be trillions of times bigger than our current observable universe. Capable of altering the fabric of time in thousands of universes including at least one 11-dimensional M-Theory universe)
Multiversal Manipulation/Creation probably Omniverse Manipulation/Creation (Created the entire manifold multiverse, a mathematical superspace/Type IV Multiverse that holds all possible mathematical possibilities and formal systems as true, including Woodin Cardinals as actual physical structures among those possibilities. Basically, it is an infinite multiverse with infinite possibilities, which is why it is perhaps classified as an omniverse.)
Existence Manipulation (The Old Ones can effortlessly change the rules of the entire Manifoldverse, allowing them to create infinite possibilities for both life and mind.)
Probably Omnidirectional/Cosmic/Energy Waves (Capable of controlling and initiating cosmic inflation across the multiverse, in which universes are described as "mere bubbles of foam on an ocean")